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arma sata i/latent (attira Letters .Patent No. 100,110, dated FebruaryV22, 1870.

The Schedule referred to in these Letters Patentand making part oi chesame.

To all whom it may concern Ee it known that I, GEORGE W. BLAKE, of thecity, county, and ,State of New York, have invented a new and usefulImprovement in Heating and Ventilating Apparatus, of which the followingis a full,

'cle-ar," and exact description, reference being had to the accompanyingdrawing forming part ofthis speciicat-ion, and in whichl Figure 1represents a front elevation of my improvement viewed from the interiorof an apartment, and

Figure 2, a vertical section taken as indicated by the line :c x, inIiig. 1. I A

My invention consists in a combination with a ra diator, when arrangedin front of a window or opposite and in proximity to the outer -Wallot'anapartment, ot' a valve or covering of a self-acting'character to anopening made inthe base portion of the window, or in Vthe Wall oppositewhich the radiator is placed, and

operating to open for ingress of air through the radiator totheapartment, whereby a most perfect heating and Ventilating action issecured.

Referringtov the accompanying drawing- A represents apartment.

C is a valve or covering hinged as ata to an opening, b, formed throughthe base or lower sill portion ofthe window, said valve being arrangedto open into the apartment, so as to admit air thereto, and closingagainst the egress of air therefrom.

Dis a radiator placed in front of the window, and in proximity to theopening b, covered by the valve O, said radiator being oi' any suitableconstruction that will cause the air as it opens the valve by thesuperincnmbent pressure oi' the air on the outside to blow through theradiator into the apartment. It isixnmaterial as to the valve G whenopen covering the space against upward draught between the radiator andthe window, as the cold air in entering will naturally drop by reason ofits superior density as compared with the heated atmosphere abcut theradiator. Said valve C may have its extent of opening limited by anysuitable stop, adjustable or otherwise, to control the amount of airadmitted through the opening b.

By this combination and arrangement of devices a most perfect heatingand AVentilating action may be sea window in an outer wall B'to anvcheck or stop to the crank d. justinent, however, if adjustment benecessary, may be adopted for controlling the inward action of said'cured, the seliactingv character oi' the valve C insuring free ingressof air to be warmed by passing through the radiator in entering theapartment, but said valve closing by its weight, or any superior currentfrom the inside toward the outside of the apartment, against` egress ofair. Thisautom-atic action of said valve will be found of great servicein large rooms -where radiators are arranged opposite each other and infront of opposite windows, as the same, or one at least of' suchopposite valves to said radiators will operate by closing to vprevent athrough draught from window to Window. Likewise, on the radiatorscooling down,'such valves will close to prevent a too great chilling ofthe room.

Y i When the radiator or radiators are arlang'edopposite and inproximity to the wall of the apartment, or between the Windowsyascontiadistinguished from in front of a'window, Athen instead ofarranging the valve to cover an opening in thei windowsill or frame, larrange the valve as at C' to cover an opening, b, in or through thewall in rear of the radiator, said valve operating in the same manner asthe -valve C tov the window as regards its automatic control of ingressand egress of air. This valve O may have its opening action regulated or.limited by a swinging stop', c, operated by a crank or handle, d,through a rock-shaft, e,v and arrested as required by a pin made toenter any one of a series of holes' in a plate, j, and serving as a Anyother mode of advalve.

What is here claimed, and desired to be secuzel by Letters Patent, is IThe combination with a radiator, when arranged relatively tothe windowor wall of an apartment, as described, ot an automatic valveto anopening made in the window or wall, said valve being so arranged andoperating as that it'serves to admit air through the radiator'to theapartment, but is self-closing against egress therefrom, substantiallyas specified. GEO. W. BLAKE. Witnesses: Y

FRED HAYNEs, It. E. RABEAU.

